Means for advancing or retarding a magneto-shaft relative to a motor-shaft.



A. LBVEDAHL.

MEANS FOR. ADVANGING 0B. RBTARDING A MAGNETO SHAFT RELATIVE TO A MOTORSHAFT APPLICATION rum) 32m. 2, 1910.

1,027,056. Patented May 21, 1912.

3 BHEBT8-SHEET 1.

A. LBVEDAHL. MEANS FOR ADVANGING 0R RETARDING A MAGNETO SHAFT RELATIVETO A MOTOR SHAFT.

APPLICATION FILED SEPT 2, 1910.

l.027,056. Patented May 21,1912.

3 SHEETS-SHEET 2.

A. LEVBD-AHL.

MEANS FOR ADVANOING 0R RBTARDING A MAGNETO SHAFT RELATIVE TO A MOTORSHAFT. APPLIOATION FILED SEPT. 2, 1910.

1,027,056. Patented May 21, 1912.

3 SHEETS-SHEET 3 l 5 uxplosi i'u 20 (111008 the 2 ml ion ill .35llu'nngill CCYPY AXEL KLEVEDAHL, OF AURORA 111111113017 il..E.-1SIGNORTi MACRINERY UGMPANY, G3? JlEUEOH-Ai TLLENflIS A *TEQRLQXH;

F i j" a i ing:

Applination filed Saptsmber A5 is pi'nvicli-(i Willi any usual mm'lmnism(nut 50 nmflnnlm m" min-mt will lmolllninud from Hm magnum nt he timewhen Hm spark is; f'n'udncmi.

lilagxneius, \Vlill wlnvh 1 am 'fmz'silinv,

Specificaiiozz if Letters Fateniz.

SH 5k FT.

1.2m. fia'rial 1m 521%.223.

angular pun-it shall a l war was ll l li'li is shown ll 1 nm'smallymmliimjwl mm.

azzrmnmg lm: will: n; im-

at the end of a rock arm 26. Said rock arm is made rigid with a shortrock shaft .27 which has bearing in the front Wall 20" of the gearcasing. -The rock shaft projects through the cover of the casing and hasmanner.

, 1 that by means of the member rigidly connected to its outer end alever 28 adapted to be actuated by an operating member 29 which is ledinto a suitable place for convenient manipulation in the usual In thepresent instance said rocking. lever 28 is shown as connected by a pin301-and a slot 30 to a link 31 which is operatively connected to arocking lever 32 operated by the member 29. is apparent 29, the rockinglever 28 may be moved to swing the rock 'arm 26. Said rock arm 26 willmove the frame 18 to bring the axis of the gear 17 to one side or theother of the line connecting the central axes of the gears 15 and 16.

Considering the gear 16 as relatively sta- .tionary, it Will be apparentthat this movement of the gear 17 with the frame 18, will cause a. glvendiameter of the gear 15 to 5 shift to the right or the left of itsoriginal in position with the frame 18 and the position, thus advancingor retarding the magnet shaft with reference to the gear 16 andtherefore with reference to the crank gear 12. In Fig. 3 I have shownthe parts gear 17 shifted to the right of the line connecting thecentral axes of the gears 15 and 16, in which case, considering themagneto shaft to be turning in the direction of the arrow, the' sparking'period will be lagged. A

movement of saidgear and frame in the opposite direction will advancethe sparking period. It is to be noted that the relative shift of theone predetermined diametric 4e axis of the magneto gear or driven gearrelative to a certain diametric axis of the driving gear, will beeffected whether the gears be at rest orin motion.

While I have illustrated and described herein a construction showing oneembodiment of my invention, it is apparent thatthe details ofconstruction may be modified without departing from the spirit of the invention, and I do not wish to be limited in any ay thereby except aspointed out in the appended claims. I claim as my invention 2- 1. In an.explosive engine, in combination with a gear easing, a motor shaftmounted in said casing, a magneto, a driving gear actuated by the motorshaft, a driven gear having driving connection with the mag gearintermediate to, and,

neto. and an idle intermeshing with, the said driving and driven gears,said idle gearbeing so movably mounted as to afford movement of itscentral axis in a direction transverse to a straightline passing throughtheaxes of the said driving anddriven gears, in a path separate from,and intermediate to, the two circular paths and said n'iagneto gear, asliding frai'ne in which said idle gear is journalcd, said frame beingadapted to move in a direction transverse to a straight line connectingthe central axes of the driving and magneto gears,

and means for shifting said frame to move the central axis of said idlegear to one side or the other of said straight 11110.

3. In an explosive engine, in combination with a gear casing, a motorshaft mounted in said casing, a magneto and a magneto shaft, a drivinggear aetuated'by the motor shaft, :1 gear on the magneto shaft, an idlegear intermediate to, and intermeshing With, said driving gear and saidmagneto gear, a sliding frame in which said idle gear is journalcd, saidframe being mounted in said Casing and adapted for movement in adirection transverse to a straight line connecting the cent *al axes ofsaid driving and magneto gears; a rock shaft journaled in said casing, arock arm on said shaft, means connecting said rock arm with said slidingframe and means for actuating said rock shaft to shift said frame formoving the central axis of the idle gear to one side or the other ofsaid line.

4-. In an explosive engine, in combination with a gear casing, a motorshaft mounted in said casing, a magneto and a magneto shaft, drivinggear actuated by the motor shaft, a gear on the magneto shaft, an idlegear intermediate to, and inter-meshing with,

said driving gear and said magneto gear, a sliding framc'in which saididle gear is journaled, said sliding frame being mounted in said easingand adapted for movement in, a direction transverse to a straight lineconneoting the central axes of said driving and driven gears, said framebeing proxided with laterally extending lugs, a rock shaft journaled insaid casing, a rock arm on said shaft adapted to engage said lugs, and

' means for actuating said rock shaft to shift said frame for moving thecentral axis of the idle gear to one side or the other of said straightline.

5. In. an explosive engine,'in combination with a gear casing havingfront and rear walls, a motor shaft mounted in said casing, a magnetoand a magneto shaft, a. driving gear actuated by the motor shaft, a gearon the magneto shaft, an idle gear intermediate to, and intermeshingwith, said driving gear and said magneto gear, a sliding frame in lineconnecting the central axes of said driv ing and driven gears, lugs onsaid sliding frame, a rock shaft jonrnaled in said casing,

said rock shaft and lugs, and means for said rock shaftto shift saidframe gear a rock arm secured to adapted to engage said to one side orthe other of said line.

, 6. In combination a driving gear, a driven gear, an idle gearintermediate to, and intermeshing with, the said driving and drivengears, said idle gear being so movably mounted as to afford movement ofits central axis in a direction transverse to a straight line passingthrough the axes of the said driving and driven gears, in a pathseparate from, and intermediate to, the two circular paths'in which saidaxis would travel if swung about the axes of said driving and drivengears and means for shirt inmsaid idle ear relativel to the drivin D b band driven gears.

7. In; combination, a driving gear, a driven gear, an idle gearintermediate to, and inter-meshing with, said driving gear and drivengear, a sliding fame in which the said idle gear is journaled, saidframe being adapted to move in a direction transverse to a straight lineconnecting the central axes of the driving and. driven gears, and meansfor shifting said frame to move the central axis of said idle gear,

In testimony, that I, claim the foregoing as my invention I aiiix mysignature in the presenceof two Witnesses, this 23rd day of August A. D.1910.

, AXEL L lVEDAHL.

\Vitnesses It. A. NonLiNe, JOHN J, Bonner.

